726317213 has 2 divisors, whose sum is σ = 726317214. Its totient is φ = 726317212.

The previous prime is 726317203. The next prime is 726317219. The reversal of 726317213 is 312713627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 447660964 + 278656249 = 21158^2 + 16693^2 .

It is an emirp because it is prime and its reverse (312713627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 726317213 - 2²² = 722122909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 726317213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726317219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363158606 + 363158607.

It is an arithmetic number, because the mean of its divisors is an integer number (363158607).

Almost surely, 2^726317213 is an apocalyptic number.

It is an amenable number.

726317213 is a deficient number, since it is larger than the sum of its proper divisors (1).

726317213 is an equidigital number, since it uses as much as digits as its factorization.

726317213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 32.

The square root of 726317213 is about 26950.2729670777. The cubic root of 726317213 is about 898.8946153447.

The spelling of 726317213 in words is "seven hundred twenty-six million, three hundred seventeen thousand, two hundred thirteen".